快速修正k值的UPF谐波与无功电流检测方法  

UPF Harmonics and Reactive Current Detection Method Based on k Rapid Correction

作　　者：赵怀军[1] 邵军[2] 邱宗明[2] 

机构地区：[1]西北工业大学,陕西西安710072 [2]西安理工大学,陕西西安710048

出　　处：《高压电器》2008年第6期501-504,508,共5页High Voltage Apparatus

摘　　要：针对常规单位功率因数(UPF)谐波与无功电流检测方法中采用低通滤波器求取等效电导k值存在较大延时的问题,笔者提出一种利用广义无功电流对k值进行快速修正的改进方法。该法通过在原有获得的k值基础上叠加一表征暂态谐波与无功电流大小的修正电导值k0来提高检测过程的动态响应性能。MATLAB仿真结果表明,改进后的UPF方法实时性和快速性明显优于常规方法,进一步的实验结果也证明了改进方法的正确性、可行性和实用性。An improved detection method using generalized reactive current to rapidly correct k is presented. The method solves the time delay problem in conventional UPF harmonic current detection method which adopts conventional low-pass filter to detect multiple equivalent conductance k. In the proposed method, a correction conductance k0 which characterizes the values of transient harmonic and reactive current is added to the previous k to improve dynamic respond performance. MATLAB simulating results indicate that the real time and speedy properties of the improved UPF detection are better than the conventional detection. Experimental results validate that this modified detection method is feasible and effective.

关 键 词：单位功率因数 广义无功电流 k值动态修正 

分 类 号：TM76[电气工程—电力系统及自动化]